semantic

package
v0.163.0 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Apr 7, 2022 License: MIT Imports: 11 Imported by: 21

Documentation

Overview

The semantic package provides a graph structure that represents the meaning of a Flux script. An AST is converted into a semantic graph for use with other systems. Using a semantic graph representation of the Flux, enables highlevel meaning to be specified programatically.

The semantic structures are to be designed to facilitate the interpretation and compilation of Flux.

For example since Flux uses the javascript AST structures, arguments to a function are represented as a single positional argument that is always an object expression. The semantic graph validates that the AST correctly follows these semantics, and use structures that are strongly typed for this expectation.

Index

Constants

View Source 
const (
	Unknown    = Kind(fbsemantic.MonoTypeNONE)
	Basic      = Kind(fbsemantic.MonoTypeBasic)
	Var        = Kind(fbsemantic.MonoTypeVar)
	Collection = Kind(fbsemantic.MonoTypeCollection)
	Record     = Kind(fbsemantic.MonoTypeRecord)
	Fun        = Kind(fbsemantic.MonoTypeFun)
	Dict       = Kind(fbsemantic.MonoTypeDict)
)

Variables

View Source 
var (
	BasicBool     = newBasicType(fbsemantic.TypeBool)
	BasicInt      = newBasicType(fbsemantic.TypeInt)
	BasicUint     = newBasicType(fbsemantic.TypeUint)
	BasicFloat    = newBasicType(fbsemantic.TypeFloat)
	BasicString   = newBasicType(fbsemantic.TypeString)
	BasicDuration = newBasicType(fbsemantic.TypeDuration)
	BasicTime     = newBasicType(fbsemantic.TypeTime)
	BasicRegexp   = newBasicType(fbsemantic.TypeRegexp)
	BasicBytes    = newBasicType(fbsemantic.TypeBytes)
)

Functions

func Formatted added in v0.50.0 

func Formatted(n Node, opts ...FormatOption) fmt.Formatter

Formatted produces a Formatter object suitable for printing using the standard fmt package. Currently only works for some expressions.

func ToAST added in v0.68.0 

func ToAST(n Node) ast.Node

ToAST will construct an AST from the semantic graph. The AST will not be preserved when going from AST -> semantic -> AST, but going from semantic -> AST -> semantic should result in the same graph.

func Walk 

func Walk(v Visitor, node Node)

Types

type Argument added in v0.68.0 

type Argument struct {
	*fbsemantic.Argument
}

Argument represents a function argument.

func (*Argument) TypeOf added in v0.68.0 

func (a *Argument) TypeOf() (MonoType, error)

TypeOf returns the type of the function argument.

type ArgumentType added in v0.68.0 

type ArgumentType struct {
	Name     []byte
	Type     MonoType
	Pipe     bool
	Optional bool
}

type ArrayExpression 

type ArrayExpression struct {
	Loc

	Elements []Expression

	Type MonoType
}

func (*ArrayExpression) Copy 

func (e *ArrayExpression) Copy() Node

func (*ArrayExpression) FromBuf added in v0.57.0 

func (rcv *ArrayExpression) FromBuf(fb *fbsemantic.ArrayExpression) error

func (*ArrayExpression) NodeType 

func (*ArrayExpression) NodeType() string

func (*ArrayExpression) TypeOf added in v0.58.0 

func (e *ArrayExpression) TypeOf() MonoType

type Assignment added in v0.14.0 

type Assignment interface {
	Statement
	// contains filtered or unexported methods
}

type BinaryExpression 

type BinaryExpression struct {
	Loc

	Operator ast.OperatorKind
	Left     Expression
	Right    Expression
	// contains filtered or unexported fields
}

func (*BinaryExpression) Copy 

func (e *BinaryExpression) Copy() Node

func (*BinaryExpression) FromBuf added in v0.57.0 

func (rcv *BinaryExpression) FromBuf(fb *fbsemantic.BinaryExpression) error

func (*BinaryExpression) NodeType 

func (*BinaryExpression) NodeType() string

func (*BinaryExpression) TypeOf added in v0.58.0 

func (e *BinaryExpression) TypeOf() MonoType

type Block added in v0.8.0 

type Block struct {
	Loc

	Body []Statement
}

func (*Block) Copy added in v0.8.0 

func (s *Block) Copy() Node

func (*Block) FromBuf added in v0.57.0 

func (rcv *Block) FromBuf(fb *fbsemantic.Block) error

func (*Block) NodeType added in v0.8.0 

func (*Block) NodeType() string

func (*Block) ReturnStatement added in v0.8.0 

func (s *Block) ReturnStatement() *ReturnStatement

type BooleanLiteral 

type BooleanLiteral struct {
	Loc
	Value bool
}

func (*BooleanLiteral) Copy 

func (l *BooleanLiteral) Copy() Node

func (*BooleanLiteral) FromBuf added in v0.57.0 

func (rcv *BooleanLiteral) FromBuf(fb *fbsemantic.BooleanLiteral) error

func (*BooleanLiteral) NodeType 

func (*BooleanLiteral) NodeType() string

func (*BooleanLiteral) TypeOf added in v0.58.0 

func (e *BooleanLiteral) TypeOf() MonoType

type BuiltinStatement added in v0.14.0 

type BuiltinStatement struct {
	Loc

	ID *Identifier
}

func (*BuiltinStatement) Copy added in v0.14.0 

func (s *BuiltinStatement) Copy() Node

func (*BuiltinStatement) FromBuf added in v0.57.0 

func (rcv *BuiltinStatement) FromBuf(fb *fbsemantic.BuiltinStatement) error

func (*BuiltinStatement) NodeType added in v0.14.0 

func (s *BuiltinStatement) NodeType() string

type CallExpression 

type CallExpression struct {
	Loc

	Callee    Expression
	Arguments *ObjectExpression
	Pipe      Expression
	// contains filtered or unexported fields
}

func (*CallExpression) Copy 

func (e *CallExpression) Copy() Node

func (*CallExpression) FromBuf added in v0.57.0 

func (rcv *CallExpression) FromBuf(fb *fbsemantic.CallExpression) error

func (*CallExpression) NodeType 

func (*CallExpression) NodeType() string

func (*CallExpression) TypeOf added in v0.58.0 

func (e *CallExpression) TypeOf() MonoType

type CollectionFB added in v0.156.0 

type CollectionFB struct {
	// contains filtered or unexported fields
}

func (*CollectionFB) CollectionType added in v0.156.0 

func (a *CollectionFB) CollectionType() fbsemantic.CollectionType

func (*CollectionFB) ElementType added in v0.156.0 

func (a *CollectionFB) ElementType() (MonoType, error)

type ConditionalExpression 

type ConditionalExpression struct {
	Loc

	Test       Expression
	Alternate  Expression
	Consequent Expression
}

func (*ConditionalExpression) Copy 

func (e *ConditionalExpression) Copy() Node

func (*ConditionalExpression) FromBuf added in v0.57.0 

func (rcv *ConditionalExpression) FromBuf(fb *fbsemantic.ConditionalExpression) error

func (*ConditionalExpression) NodeType 

func (*ConditionalExpression) NodeType() string

func (*ConditionalExpression) TypeOf added in v0.58.0 

func (e *ConditionalExpression) TypeOf() MonoType

type DateTimeLiteral 

type DateTimeLiteral struct {
	Loc
	Value time.Time
}

func (*DateTimeLiteral) Copy 

func (l *DateTimeLiteral) Copy() Node

func (*DateTimeLiteral) FromBuf added in v0.57.0 

func (rcv *DateTimeLiteral) FromBuf(fb *fbsemantic.DateTimeLiteral) error

func (*DateTimeLiteral) NodeType 

func (*DateTimeLiteral) NodeType() string

func (*DateTimeLiteral) TypeOf added in v0.58.0 

func (e *DateTimeLiteral) TypeOf() MonoType

type DictExpression added in v0.99.0 

type DictExpression struct {
	Loc

	Elements []struct {
		Key Expression
		Val Expression
	}

	Type MonoType
}

func (*DictExpression) Copy added in v0.99.0 

func (e *DictExpression) Copy() Node

func (*DictExpression) FromBuf added in v0.99.0 

func (rcv *DictExpression) FromBuf(fb *fbsemantic.DictExpression) error

func (*DictExpression) NodeType added in v0.99.0 

func (*DictExpression) NodeType() string

func (*DictExpression) TypeOf added in v0.99.0 

func (e *DictExpression) TypeOf() MonoType

type DurationLiteral 

type DurationLiteral struct {
	Loc
	Values []ast.Duration
}

func (*DurationLiteral) Copy 

func (l *DurationLiteral) Copy() Node

func (*DurationLiteral) FromBuf added in v0.57.0 

func (rcv *DurationLiteral) FromBuf(fb *fbsemantic.DurationLiteral) error

func (*DurationLiteral) NodeType 

func (*DurationLiteral) NodeType() string

func (*DurationLiteral) TypeOf added in v0.58.0 

func (e *DurationLiteral) TypeOf() MonoType

type Expression 

type Expression interface {
	Node

	TypeOf() MonoType
	// contains filtered or unexported methods
}

func ConjunctionsToExprSlice 

func ConjunctionsToExprSlice(expr Expression) []Expression

ConjunctionsToExprSlice finds all children of AndOperators that are not themselves AndOperators, and returns them in a slice. If the root node of expr is not an AndOperator, just returns expr. 

    AND
   /   \
  AND   r    =>   {p, q, r}
 /   \
p     q

func ExprsToConjunction 

func ExprsToConjunction(exprs ...Expression) Expression

ExprsToConjunction accepts a variable number of expressions and ANDs them together into a single expression. 

                     AND
                    /   \
{p, q, r}    =>    AND   r
                  /   \
                 p     q

func PartitionPredicates 

func PartitionPredicates(expr Expression, partitionFn func(expression Expression) (bool, error)) (passExpr, failExpr Expression, err error)

PartitionPredicates accepts a predicate expression, separates it into components that have been logically ANDed together, and applies partitionFn to them. Returns two expressions: one AND tree of the expressions for which partitionFn returned true, and an AND tree of expressions for which partitionFn returned false.

Suppose partitonFn returns true for p and r, and false for q: 

    AND           passExpr     failExpr
   /   \
  AND   r    =>     AND           q
 /   \             /   \
p     q           p     r

type ExpressionStatement 

type ExpressionStatement struct {
	Loc

	Expression Expression
}

func (*ExpressionStatement) Copy 

func (s *ExpressionStatement) Copy() Node

func (*ExpressionStatement) FromBuf added in v0.57.0 

func (rcv *ExpressionStatement) FromBuf(fb *fbsemantic.ExpressionStatement) error

func (*ExpressionStatement) NodeType 

func (*ExpressionStatement) NodeType() string

type File added in v0.13.0 

type File struct {
	Loc

	Package *PackageClause
	Imports []*ImportDeclaration
	Body    []Statement
}

func (*File) Copy added in v0.13.0 

func (p *File) Copy() Node

func (*File) FromBuf added in v0.57.0 

func (rcv *File) FromBuf(fb *fbsemantic.File) error

func (*File) NodeType added in v0.13.0 

func (*File) NodeType() string

type FloatLiteral 

type FloatLiteral struct {
	Loc
	Value float64
}

func (*FloatLiteral) Copy 

func (l *FloatLiteral) Copy() Node

func (*FloatLiteral) FromBuf added in v0.57.0 

func (rcv *FloatLiteral) FromBuf(fb *fbsemantic.FloatLiteral) error

func (*FloatLiteral) NodeType 

func (*FloatLiteral) NodeType() string

func (*FloatLiteral) TypeOf added in v0.58.0 

func (e *FloatLiteral) TypeOf() MonoType

type FormatOption added in v0.50.0 

type FormatOption func(*formatter)

type FunctionExpression 

type FunctionExpression struct {
	Loc

	Parameters *FunctionParameters
	Defaults   *ObjectExpression
	Block      *Block

	Vectorized *FunctionExpression
	// contains filtered or unexported fields
}

FunctionExpression represents the definition of a function

func (*FunctionExpression) Copy 

func (e *FunctionExpression) Copy() Node

func (*FunctionExpression) FromBuf added in v0.57.0 

func (e *FunctionExpression) FromBuf(fb *fbsemantic.FunctionExpression) error

func (*FunctionExpression) GetFunctionBodyExpression added in v0.68.0 

func (e *FunctionExpression) GetFunctionBodyExpression() (Expression, bool)

GetFunctionBodyExpression will return the return value expression from the function block. This will only return an expression if there is exactly one expression in the block. It will return false as the second argument if the statement is more complex.

func (*FunctionExpression) NodeType 

func (*FunctionExpression) NodeType() string

func (*FunctionExpression) TypeOf added in v0.58.0 

func (e *FunctionExpression) TypeOf() MonoType

type FunctionParameter 

type FunctionParameter struct {
	Loc

	Key *Identifier
}

FunctionParameter represents a function parameter.

func (*FunctionParameter) Copy 

func (p *FunctionParameter) Copy() Node

func (*FunctionParameter) FromBuf added in v0.57.0 

func (p *FunctionParameter) FromBuf(fb *fbsemantic.FunctionParameter) error

func (*FunctionParameter) NodeType 

func (*FunctionParameter) NodeType() string

type FunctionParameters 

type FunctionParameters struct {
	Loc

	List []*FunctionParameter
	Pipe *Identifier
}

FunctionParameters represents the list of function parameters and which if any parameter is the pipe parameter.

func (*FunctionParameters) Copy 

func (p *FunctionParameters) Copy() Node

func (*FunctionParameters) NodeType 

func (*FunctionParameters) NodeType() string

type Identifier 

type Identifier struct {
	Loc

	Name Symbol
}

func (*Identifier) Copy 

func (i *Identifier) Copy() Node

func (*Identifier) FromBuf added in v0.57.0 

func (rcv *Identifier) FromBuf(fb *fbsemantic.Identifier) error

func (*Identifier) Key added in v0.12.0 

func (n *Identifier) Key() string

func (*Identifier) NodeType 

func (*Identifier) NodeType() string

type IdentifierExpression 

type IdentifierExpression struct {
	Loc

	Name Symbol
	// contains filtered or unexported fields
}

func (*IdentifierExpression) Copy 

func (e *IdentifierExpression) Copy() Node

func (*IdentifierExpression) FromBuf added in v0.57.0 

func (rcv *IdentifierExpression) FromBuf(fb *fbsemantic.IdentifierExpression) error

func (*IdentifierExpression) NodeType 

func (*IdentifierExpression) NodeType() string

func (*IdentifierExpression) TypeOf added in v0.58.0 

func (e *IdentifierExpression) TypeOf() MonoType

type ImportDeclaration added in v0.8.0 

type ImportDeclaration struct {
	Loc

	As   *Identifier
	Path *StringLiteral
}

func (*ImportDeclaration) Copy added in v0.8.0 

func (d *ImportDeclaration) Copy() Node

func (*ImportDeclaration) FromBuf added in v0.57.0 

func (rcv *ImportDeclaration) FromBuf(fb *fbsemantic.ImportDeclaration) error

func (*ImportDeclaration) NodeType added in v0.8.0 

func (*ImportDeclaration) NodeType() string

type IndexExpression added in v0.7.1 

type IndexExpression struct {
	Loc

	Array Expression
	Index Expression
	// contains filtered or unexported fields
}

func (*IndexExpression) Copy added in v0.7.1 

func (e *IndexExpression) Copy() Node

func (*IndexExpression) FromBuf added in v0.57.0 

func (rcv *IndexExpression) FromBuf(fb *fbsemantic.IndexExpression) error

func (*IndexExpression) NodeType added in v0.7.1 

func (*IndexExpression) NodeType() string

func (*IndexExpression) TypeOf added in v0.58.0 

func (e *IndexExpression) TypeOf() MonoType

type Instantiator added in v0.153.0 

type Instantiator struct {
	// contains filtered or unexported fields
}

func (*Instantiator) Apply added in v0.153.0 

func (i *Instantiator) Apply(v uint64) (MonoType, bool)

func (*Instantiator) Fresh added in v0.153.0 

func (s *Instantiator) Fresh() uint64

type IntegerLiteral 

type IntegerLiteral struct {
	Loc
	Value int64
}

func (*IntegerLiteral) Copy 

func (l *IntegerLiteral) Copy() Node

func (*IntegerLiteral) FromBuf added in v0.57.0 

func (rcv *IntegerLiteral) FromBuf(fb *fbsemantic.IntegerLiteral) error

func (*IntegerLiteral) NodeType 

func (*IntegerLiteral) NodeType() string

func (*IntegerLiteral) TypeOf added in v0.58.0 

func (e *IntegerLiteral) TypeOf() MonoType

type InterpolatedPart added in v0.41.0 

type InterpolatedPart struct {
	Loc
	Expression Expression
}

func (*InterpolatedPart) Copy added in v0.41.0 

func (p *InterpolatedPart) Copy() Node

func (*InterpolatedPart) NodeType added in v0.41.0 

func (*InterpolatedPart) NodeType() string

type Kind 

type Kind fbsemantic.MonoType

Kind specifies a particular kind of monotype.

type Literal 

type Literal interface {
	Expression
	// contains filtered or unexported methods
}

type Loc added in v0.68.0 

type Loc ast.SourceLocation

func (*Loc) FromBuf added in v0.68.0 

func (l *Loc) FromBuf(fb *fbsemantic.SourceLocation) error

func (Loc) Location added in v0.68.0 

func (l Loc) Location() ast.SourceLocation

type LogicalExpression 

type LogicalExpression struct {
	Loc

	Operator ast.LogicalOperatorKind
	Left     Expression
	Right    Expression
}

func (*LogicalExpression) Copy 

func (e *LogicalExpression) Copy() Node

func (*LogicalExpression) FromBuf added in v0.57.0 

func (rcv *LogicalExpression) FromBuf(fb *fbsemantic.LogicalExpression) error

func (*LogicalExpression) NodeType 

func (*LogicalExpression) NodeType() string

func (*LogicalExpression) TypeOf added in v0.58.0 

func (e *LogicalExpression) TypeOf() MonoType

type MemberAssignment added in v0.14.0 

type MemberAssignment struct {
	Loc

	Member *MemberExpression
	Init   Expression
}

func (*MemberAssignment) Copy added in v0.14.0 

func (s *MemberAssignment) Copy() Node

func (*MemberAssignment) FromBuf added in v0.57.0 

func (rcv *MemberAssignment) FromBuf(fb *fbsemantic.MemberAssignment) error

func (*MemberAssignment) NodeType added in v0.14.0 

func (*MemberAssignment) NodeType() string

type MemberExpression 

type MemberExpression struct {
	Loc

	Object   Expression
	Property Symbol
	// contains filtered or unexported fields
}

func (*MemberExpression) Copy 

func (e *MemberExpression) Copy() Node

func (*MemberExpression) FromBuf added in v0.57.0 

func (rcv *MemberExpression) FromBuf(fb *fbsemantic.MemberExpression) error

func (*MemberExpression) NodeType 

func (*MemberExpression) NodeType() string

func (*MemberExpression) TypeOf added in v0.58.0 

func (e *MemberExpression) TypeOf() MonoType

type MonoType added in v0.68.0 

type MonoType struct {
	// contains filtered or unexported fields
}

MonoType represents a monotype. This struct is a thin wrapper around Go code generated by the FlatBuffers compiler.

func ExtendObjectType added in v0.68.0 

func ExtendObjectType(properties []PropertyType, extends *uint64) MonoType

func NewAppType added in v0.156.0 

func NewAppType(collection fbsemantic.CollectionType, elemType MonoType) MonoType

func NewArrayType 

func NewArrayType(elemType MonoType) MonoType

NewArrayType will construct a new Array MonoType where the inner element for the array is elemType.

func NewDictType added in v0.96.0 

func NewDictType(keyType, valueType MonoType) MonoType

NewDictType will construct a new Dict MonoType where the key element for the dict is keyType and the value element for the dict is valueType.

func NewFunctionType 

func NewFunctionType(retn MonoType, args []ArgumentType) MonoType

NewFunctionType will construct a new Function MonoType that has a return value that matches retn and arguments for each of the values in ArgumentType.

func NewMonoType added in v0.68.0 

func NewMonoType(tbl flatbuffers.Table, t fbsemantic.MonoType) (MonoType, error)

NewMonoType constructs a new monotype from a FlatBuffers table and the given kind of monotype.

func NewObjectType 

func NewObjectType(properties []PropertyType) MonoType

NewObjectType will construct a new Object MonoType with the properties in properties.

The MonoType will be constructed with the properties in the same order as they appear in the array.

func NewStreamType added in v0.156.0 

func NewStreamType(elemType MonoType) MonoType

func NewVarType added in v0.153.0 

func NewVarType(i uint64) (MonoType, error)

func NewVectorType added in v0.153.0 

func NewVectorType(elemType MonoType) MonoType

func (MonoType) Argument added in v0.68.0 

func (mt MonoType) Argument(i int) (*Argument, error)

Argument returns the argument give an ordinal position if this monotype is a function, and an error otherwise.

func (MonoType) Basic added in v0.68.0 

func (mt MonoType) Basic() (fbsemantic.Type, error)

Basic returns the basic type for this monotype if it is a basic type, and an error otherwise.

func (MonoType) CanonicalString added in v0.68.0 

func (mt MonoType) CanonicalString() string

CanonicalString returns a string representation of this monotype where the tvar numbers are contiguous and indexed starting at zero.

func (MonoType) CollectionType added in v0.156.0 

func (mt MonoType) CollectionType() (fbsemantic.CollectionType, error)

func (MonoType) ElemType added in v0.68.0 

func (mt MonoType) ElemType() (MonoType, error)

ElemType returns the element type if this monotype is an array or vector, and an error otherise

func (MonoType) Equal added in v0.68.0 

func (l MonoType) Equal(r MonoType) bool

func (MonoType) Extends added in v0.68.0 

func (mt MonoType) Extends() (MonoType, bool, error)

Extends returns the extending type variable if this monotype is a record, and an error otherwise. If the type is a record but does not extend anything a false is returned.

func (MonoType) KeyType added in v0.96.0 

func (mt MonoType) KeyType() (MonoType, error)

KeyType returns the type for the key in a Dictionary.

func (MonoType) Kind added in v0.68.0 

func (mt MonoType) Kind() Kind

Kind returns what kind of monotype the receiver is.

func (MonoType) Nature added in v0.68.0 

func (mt MonoType) Nature() Nature

func (MonoType) NumArguments added in v0.68.0 

func (mt MonoType) NumArguments() (int, error)

NumArguments returns the number of arguments if this monotype is a function, and an error otherwise.

func (MonoType) NumProperties added in v0.68.0 

func (mt MonoType) NumProperties() (int, error)

NumProperties returns the number of properties if this monotype is a record, and an error otherwise.

func (MonoType) PipeArgument added in v0.81.0 

func (mt MonoType) PipeArgument() (*Argument, error)

PipeArgument will return the pipe argument if this monotype is a function and it has a pipe argument. If this monotype is a function with no pipe argument, nil will be returned. If this monotype is not a function, an error will be returned.

func (MonoType) RecordProperty added in v0.81.0 

func (mt MonoType) RecordProperty(i int) (*RecordProperty, error)

RecordProperty returns a property given its ordinal position if this monotype is a record, and an error otherwise.

func (MonoType) ReturnType added in v0.68.0 

func (mt MonoType) ReturnType() (MonoType, error)

func (MonoType) SortedArguments added in v0.68.0 

func (mt MonoType) SortedArguments() ([]*Argument, error)

SortedArguments returns a slice of function arguments, sorted by argument name, if this monotype is a function.

func (MonoType) SortedProperties added in v0.68.0 

func (mt MonoType) SortedProperties() ([]*RecordProperty, error)

SortedProperties returns the properties for a Record monotype, sorted by key. It's possible that there are duplicate keys with different types, in this case, this function preserves their order.

func (MonoType) String added in v0.68.0 

func (mt MonoType) String() string

String returns a string representation of this monotype.

func (MonoType) ValueType added in v0.96.0 

func (mt MonoType) ValueType() (MonoType, error)

ValueType returns the type for the value in a Dictionary.

func (MonoType) VarNum added in v0.68.0 

func (mt MonoType) VarNum() (uint64, error)

VarNum returns the type variable number if this monotype is a type variable, and an error otherwise.

type NativeVariableAssignment added in v0.8.0 

type NativeVariableAssignment struct {
	Loc

	Identifier *Identifier
	Init       Expression

	Typ PolyType
}

func (*NativeVariableAssignment) Copy added in v0.8.0 

func (s *NativeVariableAssignment) Copy() Node

func (*NativeVariableAssignment) FromBuf added in v0.57.0 

func (rcv *NativeVariableAssignment) FromBuf(fb *fbsemantic.NativeVariableAssignment) error

func (*NativeVariableAssignment) NodeType added in v0.8.0 

func (*NativeVariableAssignment) NodeType() string

type Nature 

type Nature int

Nature is the primitive description of a type. 

const (
	Invalid Nature = iota
	String
	Bytes
	Int
	UInt
	Float
	Bool
	Time
	Duration
	Regexp
	Array
	Object
	Function
	Dictionary
	Vector
	Stream
)

func (Nature) String 

func (n Nature) String() string

type NestingVisitor 

type NestingVisitor interface {
	Visitor
	Nest() NestingVisitor
}

type Node 

type Node interface {
	NodeType() string
	Copy() Node

	Location() ast.SourceLocation
	// contains filtered or unexported methods
}

type ObjectExpression 

type ObjectExpression struct {
	Loc

	With       *IdentifierExpression
	Properties []*Property
	// contains filtered or unexported fields
}

func (*ObjectExpression) Copy 

func (e *ObjectExpression) Copy() Node

func (*ObjectExpression) FromBuf added in v0.57.0 

func (rcv *ObjectExpression) FromBuf(fb *fbsemantic.ObjectExpression) error

func (*ObjectExpression) NodeType 

func (*ObjectExpression) NodeType() string

func (*ObjectExpression) TypeOf added in v0.58.0 

func (e *ObjectExpression) TypeOf() MonoType

type OptionStatement 

type OptionStatement struct {
	Loc

	Assignment Assignment
}

func (*OptionStatement) Copy 

func (s *OptionStatement) Copy() Node

func (*OptionStatement) FromBuf added in v0.57.0 

func (rcv *OptionStatement) FromBuf(fb *fbsemantic.OptionStatement) error

func (*OptionStatement) NodeType 

func (s *OptionStatement) NodeType() string

type Package added in v0.8.0 

type Package struct {
	Loc

	Package string
	Files   []*File
}

func DeserializeFromFlatBuffer added in v0.57.0 

func DeserializeFromFlatBuffer(buf []byte) (*Package, error)

func (*Package) Copy added in v0.13.0 

func (p *Package) Copy() Node

func (*Package) FromBuf added in v0.57.0 

func (rcv *Package) FromBuf(fb *fbsemantic.Package) error

func (*Package) NodeType added in v0.13.0 

func (*Package) NodeType() string

type PackageClause added in v0.8.0 

type PackageClause struct {
	Loc

	Name *Identifier
}

func (*PackageClause) Copy added in v0.8.0 

func (p *PackageClause) Copy() Node

func (*PackageClause) FromBuf added in v0.57.0 

func (rcv *PackageClause) FromBuf(fb *fbsemantic.PackageClause) error

func (*PackageClause) NodeType added in v0.8.0 

func (*PackageClause) NodeType() string

type PolyType 

type PolyType struct {
	// contains filtered or unexported fields
}

PolyType represents a polytype. This struct is a thin wrapper around Go code generated by the FlatBuffers compiler.

func NewPolyType added in v0.68.0 

func NewPolyType(fb *fbsemantic.PolyType) (PolyType, error)

NewPolyType returns a new polytype given a flatbuffers polytype.

func (PolyType) CanonicalString added in v0.68.0 

func (pt PolyType) CanonicalString() string

CanonicalString returns a string representation for this polytype, where the tvar numbers are contiguous and indexed starting at zero. Tvar numbers are ordered by the order they appear in the monotype expression.

func (PolyType) Constraint added in v0.68.0 

func (pt PolyType) Constraint(i int) (*fbsemantic.Constraint, error)

Constraint returns the constraint at ordinal position i.

func (PolyType) Expr added in v0.68.0 

func (pt PolyType) Expr() (MonoType, error)

Expr returns the monotype expression for this polytype.

func (PolyType) Instantiator added in v0.153.0 

func (pt PolyType) Instantiator(subst Substitutor) (Substitutor, error)

func (PolyType) IsNil added in v0.68.0 

func (pt PolyType) IsNil() bool

For testing we need an exported method that checks whether PolyType.fb is nil.

func (PolyType) NumConstraints added in v0.68.0 

func (pt PolyType) NumConstraints() int

NumConstraints returns the number of kind constraints in this polytype.

func (PolyType) NumVars added in v0.68.0 

func (pt PolyType) NumVars() int

NumVars returns the number of type variables in this polytype.

func (*PolyType) SortedConstraints added in v0.68.0 

func (pt *PolyType) SortedConstraints() ([]*fbsemantic.Constraint, error)

SortedConstraints returns the constraints for this polytype sorted by type variable and constraint kind.

func (PolyType) SortedVars added in v0.68.0 

func (pt PolyType) SortedVars() ([]*fbsemantic.Var, error)

func (PolyType) String added in v0.68.0 

func (pt PolyType) String() string

String returns a string representation for this polytype.

func (PolyType) Var added in v0.68.0 

func (pt PolyType) Var(i int) (*fbsemantic.Var, error)

Var returns the type variable at ordinal position i.

type Property 

type Property struct {
	Loc

	Key   PropertyKey
	Value Expression
}

func (*Property) Copy 

func (p *Property) Copy() Node

func (*Property) FromBuf added in v0.57.0 

func (rcv *Property) FromBuf(fb *fbsemantic.Property) error

func (*Property) NodeType 

func (*Property) NodeType() string

type PropertyKey added in v0.12.0 

type PropertyKey interface {
	Node
	Key() string
}

type PropertyType added in v0.68.0 

type PropertyType struct {
	Key   []byte
	Value MonoType
}

type RecordProperty added in v0.81.0 

type RecordProperty struct {
	// contains filtered or unexported fields
}

Property represents a property of a record.

func (*RecordProperty) Name added in v0.81.0 

func (p *RecordProperty) Name() string

Name returns the name of the property.

func (*RecordProperty) TypeOf added in v0.81.0 

func (p *RecordProperty) TypeOf() (MonoType, error)

TypeOf returns the type of the property.

type RegexpLiteral 

type RegexpLiteral struct {
	Loc
	Value *regexp.Regexp
}

func (*RegexpLiteral) Copy 

func (l *RegexpLiteral) Copy() Node

func (*RegexpLiteral) FromBuf added in v0.57.0 

func (rcv *RegexpLiteral) FromBuf(fb *fbsemantic.RegexpLiteral) error

func (*RegexpLiteral) NodeType 

func (*RegexpLiteral) NodeType() string

func (*RegexpLiteral) TypeOf added in v0.58.0 

func (e *RegexpLiteral) TypeOf() MonoType

type ReturnStatement 

type ReturnStatement struct {
	Loc

	Argument Expression
}

func (*ReturnStatement) Copy 

func (s *ReturnStatement) Copy() Node

func (*ReturnStatement) FromBuf added in v0.57.0 

func (rcv *ReturnStatement) FromBuf(fb *fbsemantic.ReturnStatement) error

func (*ReturnStatement) NodeType 

func (*ReturnStatement) NodeType() string

type ScopedVisitor 

type ScopedVisitor struct {
	// contains filtered or unexported fields
}

ScopedVisitor will nest the given visitor when the scope changes.

func NewScopedVisitor 

func NewScopedVisitor(v NestingVisitor) ScopedVisitor

func (ScopedVisitor) Done 

func (v ScopedVisitor) Done(node Node)

func (ScopedVisitor) Visit 

func (v ScopedVisitor) Visit(node Node) Visitor

type Statement 

type Statement interface {
	Node
	// contains filtered or unexported methods
}

type StreamFB added in v0.156.0 

type StreamFB struct {
	// contains filtered or unexported fields
}

func (*StreamFB) ElementType added in v0.156.0 

func (a *StreamFB) ElementType() (MonoType, error)

type StringExpression added in v0.41.0 

type StringExpression struct {
	Loc
	Parts []StringExpressionPart
}

func (*StringExpression) Copy added in v0.41.0 

func (e *StringExpression) Copy() Node

func (*StringExpression) FromBuf added in v0.57.0 

func (rcv *StringExpression) FromBuf(fb *fbsemantic.StringExpression) error

func (*StringExpression) NodeType added in v0.41.0 

func (*StringExpression) NodeType() string

func (*StringExpression) TypeOf added in v0.58.0 

func (e *StringExpression) TypeOf() MonoType

type StringExpressionPart added in v0.41.0 

type StringExpressionPart interface {
	Node
	// contains filtered or unexported methods
}

type StringLiteral 

type StringLiteral struct {
	Loc
	Value string
}

func (*StringLiteral) Copy 

func (l *StringLiteral) Copy() Node

func (*StringLiteral) FromBuf added in v0.57.0 

func (rcv *StringLiteral) FromBuf(fb *fbsemantic.StringLiteral) error

func (*StringLiteral) Key added in v0.12.0 

func (n *StringLiteral) Key() string

func (*StringLiteral) NodeType 

func (*StringLiteral) NodeType() string

func (*StringLiteral) TypeOf added in v0.58.0 

func (e *StringLiteral) TypeOf() MonoType

type Substitution 

type Substitution struct {
	TypeMap map[uint64]MonoType
	// contains filtered or unexported fields
}

func (*Substitution) Apply added in v0.153.0 

func (i *Substitution) Apply(v uint64) (MonoType, bool)

func (*Substitution) Fresh added in v0.153.0 

func (s *Substitution) Fresh() uint64

type Substitutor added in v0.153.0 

type Substitutor interface {
	Fresh() uint64
	Apply(v uint64) (MonoType, bool)
}

type Symbol added in v0.148.0 

type Symbol struct {
	LocalName string
	Package   string
}

func NewSymbol added in v0.148.0 

func NewSymbol(name string) Symbol

func (Symbol) Name added in v0.148.0 

func (s Symbol) Name() string

type TestStatement added in v0.19.0 

type TestStatement struct {
	Loc

	Assignment *NativeVariableAssignment
}

func (*TestStatement) Copy added in v0.19.0 

func (s *TestStatement) Copy() Node

func (*TestStatement) FromBuf added in v0.57.0 

func (rcv *TestStatement) FromBuf(fb *fbsemantic.TestStatement) error

func (*TestStatement) NodeType added in v0.19.0 

func (s *TestStatement) NodeType() string

type TextPart added in v0.41.0 

type TextPart struct {
	Loc
	Value string
}

func (*TextPart) Copy added in v0.41.0 

func (p *TextPart) Copy() Node

func (*TextPart) NodeType added in v0.41.0 

func (*TextPart) NodeType() string

type UnaryExpression 

type UnaryExpression struct {
	Loc

	Operator ast.OperatorKind
	Argument Expression
	// contains filtered or unexported fields
}

func (*UnaryExpression) Copy 

func (e *UnaryExpression) Copy() Node

func (*UnaryExpression) FromBuf added in v0.57.0 

func (rcv *UnaryExpression) FromBuf(fb *fbsemantic.UnaryExpression) error

func (*UnaryExpression) NodeType 

func (*UnaryExpression) NodeType() string

func (*UnaryExpression) TypeOf added in v0.58.0 

func (e *UnaryExpression) TypeOf() MonoType

type UnsignedIntegerLiteral 

type UnsignedIntegerLiteral struct {
	Loc
	Value uint64
}

func (*UnsignedIntegerLiteral) Copy 

func (l *UnsignedIntegerLiteral) Copy() Node

func (*UnsignedIntegerLiteral) FromBuf added in v0.57.0 

func (rcv *UnsignedIntegerLiteral) FromBuf(fb *fbsemantic.UnsignedIntegerLiteral) error

func (*UnsignedIntegerLiteral) NodeType 

func (*UnsignedIntegerLiteral) NodeType() string

func (*UnsignedIntegerLiteral) TypeOf added in v0.58.0 

func (e *UnsignedIntegerLiteral) TypeOf() MonoType

type Visitor 

type Visitor interface {
	Visit(node Node) Visitor
	Done(node Node)
}

func CreateVisitor 

func CreateVisitor(f func(Node)) Visitor

Source Files

View all Source files

Directories

Path Synopsis
Package semantictest contains utilities for testing the semantic package.
 Package semantictest contains utilities for testing the semantic package.

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